Wireless bluetooth speakers 1, Power supply:Built-in 600mAh lithium battery 2, Power rating: 3W 3, Speaker unit:Single Wireless bluetooth speakers10 colors of aluminum shell, 2.0 channel, great sound !Portable speaker with compact bass design streams music.Easy charging with integrated Li-Ion-battery (USB chargeable) for max 6 hours playtimeWe also recommend ! Wireless bluetooth speakers A2